Use EMC powermt to solve PowerPath Problem

原文链接:

http://www.eygle.com/unix/Use.EMC.Powermt.Solve.Config.Problem.htm

在EMC系统中,如果你频繁的增减磁盘,重新分配规划磁盘组,那么主机可能无法正确检测到磁盘,这是后我们可以使用powermt来检测配置,
解决问题.

1.你可以会遇到如下问题

你已经分配磁盘给主机系统,但是在format时无法发现:

# format Searching for disks...done AVAILABLE DISK SELECTIONS: 0. c1t0d0 <sun72g cyl alt hd sec> /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106d9781,0 1. c1t1d0 <sun72g cyl alt hd sec> /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106ef871,0 Specify disk (enter its number): 1 selecting c1t1d0 [disk formatted] Warning: Current Disk has mounted partitions. FORMAT MENU: disk - select a disk type - select (define) a disk type partition - select (define) a partition table current - describe the current disk format - format and analyze the disk repair - repair a defective sector label - write label to the disk analyze - surface analysis defect - defect list management backup - search for backup labels verify - read and display labels save - save new disk/partition definitions inquiry - show vendor, product and revision volname - set 8-character volume name !<cmd> - execute <cmd>, then return quit format&gt; q </cmd></cmd></sun72g></sun72g>

2.此时可以使用powermt来检测PowerPath连接状态

Powermt means:PowerPath 4.x Management Utility

# powermt display dev=all Pseudo name=emcpower4a CLARiiON ID=CK200041200044 Logical device ID=6006016028A610000AF03A428708D911 state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP B, current=Unknown ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 2304 pci@8/fibre-channel@4 c2t0d3s0 SP B0 active dead 0 0 2304 pci@8/fibre-channel@4 c2t1d3s0 SP A0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t0d3s0 SP B0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t1d3s0 SP A0 active dead 0 0 Pseudo name=emcpower5a CLARiiON ID=CK200041200044 Logical device ID=6006016028A610005ABD62655B08D911 state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP A, current=Unknown ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 2304 pci@8/fibre-channel@4 c2t0d2s0 SP B0 active dead 0 0 2304 pci@8/fibre-channel@4 c2t1d2s0 SP A0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t0d2s0 SP B0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t1d2s0 SP A0 active dead 0 0 Pseudo name=emcpower0a CLARiiON ID=CK200041200044 Logical device ID=6006016028A61000C65024C992D4D811 state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP B, current=Unknown ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 2304 pci@8/fibre-channel@4 c2t0d0s0 SP B0 active dead 0 0 2304 pci@8/fibre-channel@4 c2t1d0s0 SP A0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t0d0s0 SP B0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t1d0s0 SP A0 active dead 0 0 Pseudo name=emcpower1a CLARiiON ID=CK200041200044 Logical device ID=6006016028A61000F075BD4E93D4D811 state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP A, current=Unknown ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 2304 pci@8/fibre-channel@4 c2t0d1s0 SP B0 active dead 0 0 2304 pci@8/fibre-channel@4 c2t1d1s0 SP A0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t0d1s0 SP B0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t1d1s0 SP A0 active dead 0 0 Pseudo name=emcpower6a CLARiiON ID=CK200041200044 Logical device ID=6006016028A61000FC68E575620CD911 state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP B, current=Unknown ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 2304 pci@8/fibre-channel@4 c2t0d4s0 SP B0 active dead 0 0 2304 pci@8/fibre-channel@4 c2t1d4s0 SP A0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t0d4s0 SP B0 active dead 0 0 2305 pci@8/fibre-channel@5 c3t1d4s0 SP A0 active dead 0 0

这些active dead的状态都是错误的.

3.执行重新配置

# powermt check Warning: CLARiiON device path c2t0d0s0 is currently dead. Do you want to remove it (y/n/a/q)? y Warning: CLARiiON device path c2t0d1s0 is currently dead. Do you want to remove it (y/n/a/q)? y Warning: CLARiiON device path c2t0d2s0 is currently dead. Do you want to remove it (y/n/a/q)? a Warning: CLARiiON device path c2t0d3s0 is currently dead. Warning: CLARiiON device path c2t0d4s0 is currently dead. Warning: CLARiiON device path c2t1d0s0 is currently dead. Warning: CLARiiON device path c2t1d1s0 is currently dead. Warning: CLARiiON device path c2t1d2s0 is currently dead. Warning: CLARiiON device path c2t1d3s0 is currently dead. Warning: CLARiiON device path c2t1d4s0 is currently dead. Warning: CLARiiON device path c3t0d0s0 is currently dead. Warning: CLARiiON device path c3t0d1s0 is currently dead. Warning: CLARiiON device path c3t0d2s0 is currently dead. Warning: CLARiiON device path c3t0d3s0 is currently dead. Warning: CLARiiON device path c3t0d4s0 is currently dead. Warning: CLARiiON device path c3t1d0s0 is currently dead. Warning: CLARiiON device path c3t1d1s0 is currently dead. Warning: CLARiiON device path c3t1d2s0 is currently dead. Warning: CLARiiON device path c3t1d3s0 is currently dead. Warning: CLARiiON device path c3t1d4s0 is currently dead. # powermt config # powermt restore # powermt save # powermt display dev=all Pseudo name=emcpower7a CLARiiON ID=CK200041200044 [Storage Group 2] Logical device ID=6006016028A61000482F2BA9720CD911 [LUN 1] state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP B, current=SP B ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 2304 pci@8/fibre-channel@4 c2t0d0s0 SP B0 active alive 0 0 2304 pci@8/fibre-channel@4 c2t1d0s0 SP A0 active alive 0 0 2305 pci@8/fibre-channel@5 c3t0d0s0 SP B0 active alive 0 0 2305 pci@8/fibre-channel@5 c3t1d0s0 SP A0 active alive 0 0

此时的active alive状态正常.

4.此时执行format可以看到正确的磁盘

# format Searching for disks...done c2t0d0: configured with capacity of 40.00GB c2t1d0: configured with capacity of 40.00GB c3t0d0: configured with capacity of 40.00GB c3t1d0: configured with capacity of 40.00GB emcpower7a: configured with capacity of 40.00GB AVAILABLE DISK SELECTIONS: 0. c1t0d0 <sun72g cyl alt hd sec> /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106d9781,0 1. c1t1d0 <sun72g cyl alt hd sec> /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106ef871,0 2. c2t0d0 <dgc-raid5-0206 cyl alt hd sec> /pci@8,700000/fibre-channel@4/sd@0,0 3. c2t1d0 <dgc-raid5-0206 cyl alt hd sec> /pci@8,700000/fibre-channel@4/sd@1,0 4. c3t0d0 <dgc-raid5-0206 cyl alt hd sec> /pci@8,700000/fibre-channel@5/sd@0,0 5. c3t1d0 <dgc-raid5-0206 cyl alt hd sec> /pci@8,700000/fibre-channel@5/sd@1,0 6. emcpower7a <dgc-raid5-0206 cyl alt hd sec> /pseudo/emcp@7 Specify disk (enter its number): ^D </dgc-raid5-0206></dgc-raid5-0206></dgc-raid5-0206></dgc-raid5-0206></dgc-raid5-0206></sun72g></sun72g>

具体Powermt命令参考:

http://blog.csdn.net/eygle/archive/2004/09/23/113881.aspx

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